错误信息
The following _CastError was thrown building GetBuilder(state: GetBuilderState#0f3bb): Null check operator used on a null value
Null check operator used on a null value
'''
Widget build(BuildContext context) {
return contentView();
}
'''
查看当前contentView() 内部的子view 有没有用到未初始化的变量或者类; 如果有就会提示报错;
当然与GetBuilder没关, 使用普通的widget时,内部的子view有用到 null的类/变量时 也会报错.
